土工基础

›› 2012, Vol. 26 ›› Issue (3): 54-56.

• 工程实录 • 上一篇    下一篇

根据桩身侧向位移反演非极限状态下土压力分布

黄争胜，刘成禹   

  1. （福州大学环境与资源学院，福州 350108）
  • 收稿日期:2011-10-15 出版日期:2012-06-20 发布日期:2012-06-25
  • 作者简介:黄争胜（1987-），男，现为福州大学环境与资源学院在读研究生。

Pre-Limit State Earth Pressure Distribution along Piles Back  Analyzed from the Pile Horizontal Displacements

HUANG Zhengsheng, LIU Chengyu   

  1. (College of Environment and Resources, Fuzhou University, Fuzhou 350108)
  • Received:2011-10-15 Online:2012-06-20 Published:2012-06-25

摘要： 根据支护桩侧向位移，反演了非极限状态下桩身所受土压力从而进行了支护桩设计，并结合工程实例进行了验算，结果表明：利用非极限状态下土压力与桩身位移的关系式，反演出桩身的受力状态处于静止土压力与主动土压力之间，符合非极限状态下土压力处于静止土压力与极限土压力之间的基本假设；并根据对反演土压力进行的验算，得出了其在基坑不同深度情况下计算的准确性。

关键词: 朗肯土压力理论, 库仑土压力理论, 桩身变形, 非极限状态

Abstract: The earth pressure is the major loading for the design of the deep excavation supporting system. Therefore, it is essential to accurately estimate the earth pressures along the supporting piles in order to safeguard the excavation construction. This paper presents the prelimit state earth pressure distribution along the pile. The earth pressures were back analyzed from the horizontal displacement supporting piles. The results indicated that the earth pressures acting on the piles are between the atrest and active earth pressure theories. This result is consistent with the prelimit state earth pressure distribution assumptions. The actual earth pressures at greater depths are predicted based on the back analysis results.

Key words: Rankin earth pressure theory, Coulomb earth pressure theory, Lateral deflection of piles, Prelimit state Earth Pressures